Steam and water collector for high-pressure boilers



Nov. Z' 1926.

0.H. HARTMANN s'rEm Aun wA'rEa COLLECTOR Fon HIGH PRESSURE oLERs Filed Dec. 5 1922 M A HN mw N w .W N N m R E. H `m 0 r t @Maxam/mers w/TNEssy `30 t question hitherto.

Patented Nov. 2, 1926. l

UNITED STATES OTTO HERMANN HARTMANN,

or cAssnL-wrnnnmjrsnonn, GERMANY, nssreiroa 'ro SCHMIDTSCHH HEISSDAMPF GESELLSCHAFT, OF CASSEL-WILHELMSHOHE, GER- MANY, A CORPORATION OF GERMANY.

STEAM'. AND WATER COLLECTOR FOR HIGH-PRESSURE BOILERS.

Application There are considerable difficulties in the manufacture of riveted reservoirs for boilers for high working ,pressures particularly of 30 atm. and more, for the reservoirs for the steamand water-collectors used which have comparatively small diameters of about 1000 to 1200 m/m. require such a thickness of the rivets that is impossible to clench the latter by hand. Machine-riveting can be carried out satisfactorily only if the flanged edges of both bottoms are directed outwards. According to the prevailing practice the bottoms `water-collectors are manufactured of boiler plate, the Aedge being flanged. This can only be done if the bottom plate proper is connected with the edge by a curved portion. Therefore it is impossible to form an inner caulking edge for tightening purposes ""0 on the bottoms used so far. lf acaulking edge on such bottoms is intended to be produced this would only be possible at the outer edge (looking lengthwise of the boiler or reservoir). With high pressures, particularly those of the order mentioned above, the production of a safe tight joint seems to beimpossible in this way. Therefore the manufacture of riveted steamand water-collectors has been considered out of the Now, according to the invention this problem is solved in a simple andnreliable way byinserting the bottoms of the boiler which are provided with an outwardly extending fiange in such a manner into the shell of theboiler that the riveting of the joint may be edected from the outside,

whereas the tightening of the joint is effected from the interior of the boiler by 40 lcaulking that portion of the bottom which is adjacent to the inner surface of the boiler. n order to enable the formation of a caulkingedge, the bottom of the boiler is to be manufactured as a forged piece or casting, having a suitable shape of the edge.

With this invention it is nonr possible to have the bottoms of the boiler jointed with the shell by riveting; even for very high working pressures.

.50 An example of the invention is illustrated by the .accompanying drawings, in which i Fig. 1 is a longitudinal section of a boiler,

' drum, or reservoir, withparts broken awa Fig. 2 is an end 'ew looking from the rig t slightly of the steamand led December 5, 1922, Serial No. 605,004, and in Germany December 2'?,` 1921.

of Fig. 1; Fig. 3 is a longitudinal section showing part of the right hand portion of Fig. 1 upon an enlarged scale; and Fig. 4 is an enlarged longitudinal section of a voir consists of the shell A and the bottoms or heads B. Each of the latter is provided with a flange c which bears against the rel'- atively thin part d of the shell A. This portion of reduced thickness is formed by machining (turning off, etc). Rivets connect the bottom with the shell. At e (Fig. 3) a caulking edge is produced. Instead of the caulkingl edge a caulking ring f maybe used with the same e'ect (see Fig. 4f). rhe purpose of reducing the thickness of the shell A at d is to facilitate the riveting operation, since it enables smaller rivets to different construction. The reser be used. It will be noted that the head B 1 has an annular surface perpendicular to the inner surface of the shell A, so that the pressure exerted duringcaulking will properly close the joint instead of tending to open it. Such inner surface of the shell A is smooth, or at least of uniform diameter, at theu portion in contact with the head .or bottom B and immediatelyadjacent to said contact portion.

I claim 1. A structure of the character described,

comprising a tubular shell and a bottom iitted into the end portion of suchshell, said bottom comprising a body portion extending transversely of the axis of the shell and an outwardly directed flange extending lengthwise of the shell and riveted to the inner surface of that portion of the shell which projects beyond said body portion of the bottom, said body portion extending close to the inner surface of the shell and having an annular sharp edge in contact with said inner surface to form an annular caulking surface to obtain a tight interior joint between the shell and the bottom.

2. A structure of the character described, comprising a tubular shell and a bottom fitted into the end portion of such shell, said bottom comprising a body portion extending transversely of the axis of the shell and an outwardly directed flange extending lengthwise of the shell and riveted to the inner surface of that portion of the shell close to the inner surface of the shell and having an annular surface perpendicular to said surface and adjacent thereto to facilitate the formation of a caulked interior joint between the shell and the bottom.

3. A structure of the character described, comprising a tubular ted into the end portion of such shell, said bottom comprisingr a body portion extending transversely of the axis of the shell and an outwardly directed flange extending lengthwise of the shell and riveted to the inner surface of that portion ofthe shell shell and a bottom it' which projects beyond said body portion'of the bottom, the inner surface of the'shell being of. uniform diameter at the portion in contact with such bottom and immediately adjacent to said Contact portion, and said body portion extending close to such inner surface of the shell and inner surface of the shell and immediately adjacent thereto to facilitate the formation of a caulked interior joint between the shell and the bottom.

OTTO HERMANN HARTMANN.

A having an annular 20 surface substantially perpendicular to said 

